Questão jurídica principal
Whether the defendant's personal undertaking was a suretyship or a cumulative debt assumption
Decisão extraída
The wording and context established a cumulative debt assumption, not a suretyship.
Fundamentação extraída
The terms 'cumulatively' and 'personally, next to the client' indicated an independent co-obligation. The plaintiff could rely on the defendant's commercial experience and interest in the transaction.